Emergency street-car brake.



J. A. GUTMANN.

EMERGENCY STREET GAR BRAKE.

APPLICATION FILED JUNE 25, 1910.

977,089. Patented N0v. 29,1910.

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LK/ m JOHN A. GUTMANN, OF WILKES-BARRE, PENNSYLVANIA.

EMERGENCY STREET-CAR BRAKE.

Specification of Letters Patent.

Patented Nov. 29, 1910.

Application filed June 25, 1910. Serial No. 568,813.

To all whom it may concern:

Be it known that 1, JOHN A. GUTMANN, a citizen of the United States,residing at TVilkes-Barre, in the county of Luzerne and State ofPennsylvania, have invented a new and useful Improvement in EmergencyStreet-Car Brakes.

This invention relates to certain new and useful improvements in carbrakes, and more particularly to brakes adapted to be used in connectionwith street cars; the object being to provide a car with an emergencybrake which can be thrown into engagement with the track in such amanner that the car can be brought to a stop quickly.

Another object of my invention is to provide a brake which is operatedby turn wheel carried by a shaft mounted in the platform of the caradjacent where the motorman stands, whereby the same can be readilyoperated by the motorman in case that the ordinary brake fails to work.

A still further object of my invention is to provide a very novel formof brake shoe, whereby the same can be quickly adjusted so as to bringanother surface into position to engage the track When the same becomesworn.

Another object of my invention is to provide a brake which isexceedingly simple and cheap in construction, and one in which the crankshaft carrying the brake shoes is operated by a lever, through themedium of a chain and operating shaft, said crank shaft being normallyheld in such a position that shoes will be out of engagement with thetrack.

lVith these various objects in view, my invention consists of the novelfeatures of construction, combination and arrangement of partshereinafter fully described, pointed out in the claims and shown in theaccompanying drawings, in which,

Figure 1 is a side elevation of a car showing the application of myimproved brake. Fig. 2 is top plan view, the body of the car beingremoved. Fig. 3 is a detailed section.

In carrying out my improved invention I employ bearing members A,adapted to be secured on the truck B of an ordinary street car C, whichmay be a single or double truck car. The bearings are secured on thetruck to the rear of the wheels, and mounted within the bearings is ashaft D, having a crank arm E at each end, provided with a squareportion on which is mounted a grooved disk F, forming a brake shoe, saiddisk being provided with a square opening to receive the square portionof the crank arm, so that the same can be taken off and turned, in orderto bring a new wearing surface into position to engage the track.

The ends of the crank arms are threaded on which work nuts for securingthe disk in position thereon, and these disks are so arranged that whenthe crank arm is operated they will be thrown into engagement with thetrack in such a manner that the frictional contact between the shoe andrail will stop the car quickly. The crank shaft is provided with acentral arm H having an apertured end in which is arranged a link I, thefree end of which is connected to a lever J, mounted on a post K,carried by a support K, mounted on the truck, and said post is connectedto one of the bearings by a brace K By this arrangement when the leveris turned on its pivot, the crank shaft will be rocked so as to throwthe shoes into engagement with the track, and when released will bedrawn back so as to raise the shoes, by a coil spring L connecting thearm H to the truck, as clearly shown.

The lever J is connected to one end of a chain M, the other end of whichextends forwardly over the truck, and is connected to an operating shaftN, which extends up through the platform of the car, and is providedwith a hand wheel N, for turning the same, and it will be seen, thatwhen the shaft N is rotated the chain M will be wound around the lowerend, so as to swing the lever J on its pivot, which in turn rocks thecrank shaft, so as to throw the shoes into engagement with the track insuch a way that the movement of the car causes the shoes to bind againstthe rails.

What I claim is:

1. The combination with a car, of bearings secured to the truck of thecar, to the rear of the wheels, a shaft mounted in sai'd bearings,provided with crank arms at its ends, having square portions, brakeshoes comprising grooved disks, mounted on the ends of said crank arms,said shaft being provided with a central arm, a spring connecting saidarm to the truck, a post carried by support arranged on said truck, alever pivotally mounted on said post, a link con necting one end of saidlever to said arm,

and a chain connected to the other end of said lever, operated by ashaft having a hand Wheel.

2. The combination With a car, of a crank shaft mounted in bearingscarried by the truck of the car, removable brake shoes carried by thearms of said crank shaft, said shaft being provided with a central arm,a spring connecting said arm to said truck, for holding said shoes abovethe track, a post carried by a support arranged on said truck, a leverpivotally mounted on said post, a link connecting said lever to saidarm, a chain connected to the other end ofsaid lever, and an operatingshaft mounted 15 in the platform of the car, to Which the free end ofsaid chain is connected.

JOHN A. GUTMANN.

WVitnesses ARTHUR H. RICHARDS, JAMES HOWORTH.

